I just plugged in a USB stick, edited a text file a few times, and found that I could browse through the revision history of the file, even though it's on an external drive. Are these revisions saved on the USB stick? Where exactly?
MacOS – Where does Lion’s autosave feature save past versions
autosavemacos
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Best Answer
There are a couple SQLite databases located in a hidden folder on the root of your hard drive that are tasked with tracking the files and the differences between the versions.
The directory is:
The two databases are:
Source: http://arstechnica.com/apple/reviews/2011/07/mac-os-x-10-7.ars/14#versioning-internals